Firewood BTU Chart: Heat Values by Wood Species

A firewood BTU chart compares the thermal heat output of different wood species when seasoned and burned for home heating. Dense hardwoods like hickory, oak, and beech deliver the highest heat per cord, while lighter softwoods like pine and spruce ignite faster but yield less total heat. Checking heat value ratings helps wood burners select the right species for sustained overnight burns in a stove or quick warming fires in an open hearth.

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The quick answer

Firewood heat output depends primarily on wood density and moisture content. Dense hardwoods sit at the top of any firewood heat value chart because they pack more wood fiber into every cord, burning with sustained heat and leaving durable coal beds. Medium hardwoods like birch and cherry produce moderate heat with bright flames, while softwoods like pine provide quick kindling for starting fires. To get the maximum heat from any wood, it must be thoroughly seasoned until moisture drops to dry levels, as wet wood wastes heat boiling off water instead of warming your living space. For a deeper breakdown of top-performing woods, see our guide to the best firewood to burn.

Firewood BTU chart by species

Wood species	Heat value tier	Burn characteristics
Hickory	High heat	Intense heat output, long-lasting coal bed, ideal for cold weather
Black locust	High heat	Heavy dense wood, burns very hot, durable coals
White oak, red oak	High heat	Steady even heat, slow burn, superior overnight fuel
Beech	High heat	Dense wood fiber, clean bright flame, strong coal bed
Hard maple	Medium-high heat	Hot steady burn, durable coals, clean wood smoke
White ash	Medium-high heat	Steady heat delivery, splits easily, burns cleanly
Birch	Medium heat	Lively bright flame, pleasant aroma, medium coal bed
Cherry	Medium heat	Sweet wood smoke aroma, moderate heat, steady flame
Elm	Medium-low heat	Burns steadily when seasoned, moderate coal bed
Douglas fir	Medium-low heat	Rapid ignition, quick warmth, popping coals
Pine	Low heat	Fast lighting, brisk flame, low coals, ideal kindling
Cedar	Low heat	Ignites quickly, pleasant aroma, burns fast with low coals

Use this heat value comparison to plan your firewood cords. Dense species provide the sustained warmth needed for deep winter heating, while lighter species work well for kindling and mild shoulder season fires.

What affects firewood heat value

Wood density and moisture content

A British Thermal Unit, or BTU, measures thermal energy. When comparing firewood, density and moisture content determine how much usable heat a load delivers. On a dry weight basis, a pound of wood fiber produces roughly similar thermal energy across species. However, dense hardwoods pack significantly more pounds of dry wood fiber into a cord than lighter softwoods. Moisture also plays a decisive role. Unseasoned firewood contains high moisture content, forcing the fire to expend heat boiling water rather than heating the room.

Hardwood versus softwood heat delivery

Hardwoods come from broadleaf deciduous trees, whereas softwoods come from needle-bearing conifers. Dense hardwoods like hickory and oak burn with slow, sustained coals that hold temperatures for hours. Softwoods contain natural pitch and resin, causing them to ignite rapidly and reach peak temperature quickly, which makes them exceptional kindling but poor choices for overnight heating.

Reference listings and packaged firewood data

Packaged firewood listings and manufactured fuel makers provide checkable figures for heat values, moisture content, and wood dimensions:

• GREEN MOUNTAIN FIRE WOOD: The maker lists its compressed wood logs with a stated heat output of 8,852 BTU per pound against a promotional comparison figure of 5,400 BTU per pound for oak. The listing states a density of 1,687 pounds per cubic yard, less than 4 percent moisture, and a burn time of 2 to 5 hours for extended fires. These figures reflect the maker’s claims for its compressed briquettes rather than natural species cordwood averages.
• Duraflame: The maker lists its manufactured fire logs to burn for up to 3 hours, achieving full ignition in approximately 5 minutes, and claims in its promotional bullet points that they burn 80 percent cleaner than regular cordwood.
• Firewood Central: The listing states kiln-dried Pennsylvania hickory splits dried to 15 percent moisture or less, packaged in 16-inch lengths with an approximate bundle weight of 38 pounds.
• Old Potters: The maker lists kiln-dried hickory cut to 16-inch logs weighing 38 to 45 pounds for a 1.5 cubic foot bundle. The brand also lists cherry cooking wood cut to 8 inches in length and 2 to 3 inches thick.
• WIFER: The listing states kiln-dried pine mini sticks cut to 4 inches long weighing 2 pounds per box, maintaining a moisture content of less than 6 percent and providing burn times of 20 to 30 minutes in compact tabletop appliances.
• Woodover: The maker lists seasoned birch, oak, and fruit wood logs cut to 15 inches with 1,200 cubic inches per bundle, weighing 15 to 20 pounds.
• FiveOaks Firewood: The listing states mini split oak cooking wood measuring 7 to 8 inches long and 1 to 2 inches wide, providing 1,248 cubic inches per box.

How to get the most BTU from your firewood

Getting full heat value from your firewood requires proper preparation, storage, and combustion practices:

Burn only seasoned firewood

Unseasoned wood wastes significant heat energy evaporating internal sap and water. Always check your wood with a reliable meter from our guide to the best firewood moisture meter and review the visual signs in how to tell if firewood is seasoned before loading your firebox. The U.S. EPA Burn Wise program advises burning only dry, seasoned firewood to reduce flue smoke and maximize heat output.

Split logs for faster drying and clean combustion

Whole rounds dry slowly because intact bark seals moisture inside. Splitting logs exposes fresh grain faces to air and sun. Hand splitting with a splitting maul or a balanced splitting axe works well for moderate wood piles, while the best log splitter for home use saves significant labor on multi-cord heating supplies.

Stack off the soil and shelter the top

Ground contact draws dampness into bottom log tiers and invites fungal decay. Elevate stacks on treated runners or an outdoor rack from our guide to the best firewood rack with cover. Follow proper airflow techniques detailed in how to stack firewood and read should you cover firewood to understand why covering the top while keeping stack flanks open to wind promotes steady drying.

Manage stove temperature and combustion air

Operate your stove within clean burning temperature ranges. Using a magnetic flue monitor from our best stove thermometer guide helps prevent sluggish, creosote-forming smolders as well as wasteful over-firing in the best wood stove for heating a house.

Comparing hardwood vs softwood heat output

Choosing between wood varieties involves balancing burn rate, flame style, and heating goals. For an in-depth comparison, read our detailed guide on hardwood vs softwood firewood.

Hardwoods excel when steady, long-duration heating is required. Because species like oak, hickory, and hard maple feature dense cellular structure, a single firebox loading provides enduring warmth and maintains coals through the night. Softwoods like pine, cedar, and fir ignite quickly, throw lively flames, and leave minimal coals. They serve as ideal kindling for establishing draft in a cold flue or providing quick morning warmth during autumn.

Calculating your winter firewood cords

Heating a home comfortably requires knowing how many cords of wood your climate and stove will consume. To understand wood volume measurements and cord terminology, consult our guides on how much is a cord of wood and face cord vs full cord.

Firewood burning safety guidelines

Safe firewood heating requires strict adherence to appliance clearances and home safety practices. Install wood burning equipment in compliance with maker instructions and local building codes. Safety standards from the National Fire Protection Association (NFPA) and the Chimney Safety Institute of America (CSIA) emphasize maintaining operational smoke alarms and carbon monoxide detectors on every living level, scheduling annual chimney inspections by certified professionals, and burning exclusively dry wood to minimize flue creosote accumulation.

Frequently Asked Questions

Which firewood produces the most BTU?

Dense hardwoods like hickory, black locust, and oak produce the highest BTU output per cord. Their tightly packed wood fiber delivers intense thermal energy and establishes long-lasting coal beds.

Does oak have a higher BTU than pine?

Yes. Oak features high density, yielding substantially more thermal energy per cord than pine. While pine lights rapidly and warms a room quickly, it burns away fast and requires frequent reloading.

Does dry firewood produce more heat than wet wood?

Yes. Damp firewood expends thermal energy boiling away internal moisture rather than radiating warmth into your home. Seasoned firewood burns cleaner and releases its full heat potential.

Can you burn softwoods in a wood stove?

Yes, thoroughly seasoned softwoods like pine, fir, and cedar can be burned cleanly in wood stoves. They serve as excellent kindling and shoulder season fuel, though dense hardwoods remain preferable for sustained overnight heating.

How do I know if firewood is seasoned enough to give full heat?

Check a fresh split face with a moisture meter. Seasoned wood also displays radial checks along cut ends, feels light in hand, features loosening bark, and makes a clear ringing sound when two pieces strike together.

Why does wood density matter for heat output?

On a dry pound-for-pound basis, wood fiber yields similar thermal energy. However, firewood is stored and loaded by volume. Dense woods pack far more pounds of fiber into each firebox load, resulting in significantly more total heat.

Related guides

Check drying timelines in how long to season firewood and how to season firewood fast. Learn proper moisture levels in what moisture content should firewood be. Cut and maintain firewood tools with the best chainsaw for firewood and the best chainsaw sharpener. Browse our category hubs for firewood handling and firewood storage.

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